Hello goswami6, welcome to Seven Forums!
Sorry to see you having trouble, a question?
Did you get the factory Windows 7 running again without issue, if not you will have to look around at the links theog posted above to get that sorted?
If you were able to get the factory Windows 7 running again, there will be no issues at all with the way you recovered to the factory load, that should not be a concern to you or your father.
Windows XP no longer has support from MS (or very soon will not) and it would be best for your father to learn to use Windows 7 as this is where the future is headed.